package com.ruoyi.web.controller.common;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.*;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;

/**
 * 通用请求处理
 * 
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController
{
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     * 
     * @param fileName 文件名称
     * @param delete 是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            if (!FileUtils.checkAllowDownload(fileName))
            {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete)
            {
                FileUtils.deleteFile(filePath);
            }
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }


    @GetMapping("/generateQRCode")
    @ApiOperation("显示二维码")
    public AjaxResult generateQRCode(String id) {
//        String context = id.toString();
//        int width = 300; // 二维码宽度
//        int height = 300; // 二维码高度
//        String format = "png"; // 图片格式
//        try {
//            Map<EncodeHintType, Object> hints = new HashMap<>();
//            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
//            BitMatrix bitMatrix = new MultiFormatWriter().encode(context, BarcodeFormat.QR_CODE, width, height, hints);
//            ByteArrayOutputStream out = new ByteArrayOutputStream();
//            MatrixToImageWriter.writeToStream(bitMatrix, format, out);
//            byte[] bytes = out.toByteArray();
//
//            ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
//            HttpHeaders headers = new HttpHeaders();
//            headers.setContentType(MediaType.IMAGE_PNG);
//            headers.setContentDisposition(ContentDisposition.builder("inline").filename("qrcode.png").build());
//            headers.setContentLength(bytes.length);
//            InputStreamResource inputStreamResource = new InputStreamResource(inputStream);
//            ResponseEntity<InputStreamResource> inputStreamResourceResponseEntity =
//            new ResponseEntity<>(inputStreamResource, headers, HttpStatus.OK);
//            return inputStreamResourceResponseEntity;
//
//        } catch (Exception e) {
//            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
//        }
        AjaxResult ajax = AjaxResult.success();
        String context = id.toString();
        int width = 300; // 二维码宽度
        int height = 300; // 二维码高度
        String format = "png"; // 图片格式
        try {
            Map<EncodeHintType, Object> hints = new HashMap<>();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            BitMatrix bitMatrix = new MultiFormatWriter().encode(context, BarcodeFormat.QR_CODE, width, height, hints);
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            MatrixToImageWriter.writeToStream(bitMatrix, format, out);
            byte[] bytes = out.toByteArray();

            // 使用ImageIO将字节数组转换为BufferedImage
            InputStream in = new ByteArrayInputStream(bytes);
            BufferedImage bufferedImage = ImageIO.read(in);

            // 将BufferedImage转换为Base64编码的字符串
            ByteArrayOutputStream imageOut = new ByteArrayOutputStream();
            ImageIO.write(bufferedImage, format, imageOut);
            String base64Image = Base64.getEncoder().encodeToString(imageOut.toByteArray());
            ajax.put("img", base64Image);
            return ajax;
        } catch (Exception e) {
            // 返回异常信息或错误码
            return AjaxResult.error(e.getMessage());
        }
    }


    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        try
        {
            if (!FileUtils.checkAllowDownload(resource))
            {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }
}
